What is the definition or description of: intussusception?

Telescoping bowel: Intussusception is a condition where the bowel telescopes on itself. It occurs in 0.07% of infants and is most common between 4 - 9 months of age. It produces signs and symptoms of bowel blockage - Vomiting (in 81%), Bloody poos (in 61%) and abdominal pain (59%). The poos are sometimes said to look like red currant jelly. Ultrasound confirms the diagnosis. Treatment: air enema and/or surgery.

Intussusception: Intussusception happens when one portion of the bowel slides into the next, much like the pieces of a telescope. It is the most common abdominal emergency affecting children under 2 years old. It is more frequent in boys. Intussusception happens in 1 to 4 out of every 1,000 infants.